text: /* The copyright in this software is being made available under the BSD
   * License, included below. This software may be subject to other third party
   * and contributor rights, including patent rights, and no such rights are
   * granted under this license.
   *
   * Copyright (c) 2010-2021, ITU/ISO/IEC
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   *  * Redistributions of source code must retain the above copyright notice,
   *    this list of conditions and the following disclaimer.
   *  * Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   *  * Neither the name of the ITU/ISO/IEC nor the names of its contributors may
   *    be used to endorse or promote products derived from this software without
   *    specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   * THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #pragma once
  
  #ifndef __NAL__
  #define __NAL__
  
  #include <sstream>
  #include "CommonDef.h"
  
  class TComOutputBitstream;
  
  /**
   * Represents a single NALunit header and the associated RBSPayload
   */
  struct NALUnit
  {
    NalUnitType m_nalUnitType; ///< nal_unit_type
    UInt        m_temporalId;  ///< temporal_id
    UInt        m_nuhLayerId;  ///< nuh_layer_id
  
    NALUnit(const NALUnit &src)
    :m_nalUnitType (src.m_nalUnitType)
    ,m_temporalId  (src.m_temporalId)
    ,m_nuhLayerId  (src.m_nuhLayerId)
    { }
    /** construct an NALunit structure with given header values. */
    NALUnit(
      NalUnitType nalUnitType,
      Int         temporalId = 0,
      Int         nuhLayerId = 0)
      :m_nalUnitType (nalUnitType)
      ,m_temporalId  (temporalId)
      ,m_nuhLayerId  (nuhLayerId)
    {}
  
    /** default constructor - no initialization; must be performed by user */
    NALUnit() {}
  
    virtual ~NALUnit() { }
  
    /** returns true if the NALunit is a slice NALunit */
    Bool isSlice()
    {
      return m_nalUnitType == NAL_UNIT_CODED_SLICE_TRAIL_R
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_TRAIL_N
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_TSA_R
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_TSA_N
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_STSA_R
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_STSA_N
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_BLA_W_LP
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_BLA_W_RADL
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_BLA_N_LP
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_IDR_W_RADL
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_IDR_N_LP
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_CRA
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_RADL_N
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_RADL_R
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_RASL_N
          || m_nalUnitType == NAL_UNIT_CODED_SLICE_RASL_R;
    }
    Bool isSei()
    {
      return m_nalUnitType == NAL_UNIT_PREFIX_SEI
          || m_nalUnitType == NAL_UNIT_SUFFIX_SEI;
    }
  
    Bool isVcl()
    {
      return ( (UInt)m_nalUnitType < 32 );
    }
  };
  
  struct OutputNALUnit;
  
  /**
   * A single NALunit, with complete payload in EBSP format.
   */
  struct NALUnitEBSP : public NALUnit
  {
    std::ostringstream m_nalUnitData;
  
    /**
     * convert the OutputNALUnit nalu into EBSP format by writing out
     * the NALUnit header, then the rbsp_bytes including any
     * emulation_prevention_three_byte symbols.
     */
    NALUnitEBSP(OutputNALUnit& nalu);
  };
  //! \}
  //! \}
  
  #endif
  